Commercial Flat Roof Systems
Modified bitumen, BUR, and built-up roof systems for Central Florida commercial properties. Decades of system longevity with proper maintenance.
Commercial Flat Roofs Built to Last
Sun State Solar and Roofing installs and services every major Florida commercial flat roof system — modified bitumen (mod-bit), built-up roofing (BUR / hot-tar), TPO single-ply, and EPDM rubber. We work on offices, retail centers, warehouses, restaurants, and industrial properties across Central Florida. State-certified, fully insured.
The right flat roof system depends on the building, the budget, and the maintenance program you can commit to. BUR is the longest-lasting traditional system but installation is messier and more time-consuming. Modified bitumen is faster and cleaner, with similar longevity. TPO is the modern default for new commercial flat roofs at moderate-to-large square footage. We help you select the right system rather than push whichever one we'd prefer to install.
Flat Roof Systems We Install
- Modified bitumen — torch-down or self-adhered, 20-25 year life, faster install than BUR
- Built-up roofing (BUR) — traditional hot-tar with multiple plies, 25-30 year life, premium longevity
- TPO single-ply — heat-welded thermoplastic membrane, energy-efficient, modern default for many properties (learn more →)
- EPDM rubber — single-ply rubber membrane, proven longevity, cost-effective
Why Maintenance Matters Most
The biggest variable in flat-roof lifespan isn't the system you choose — it's the maintenance program you stick to. Quarterly drain clearing, seam inspection, and sealant refresh routinely add 5-10 years of service life and prevent the standing-water issues that cause most premature flat-roof failures. We offer structured maintenance contracts for property managers and facility teams.
How to Choose Between Flat Roof Systems
A few questions narrow it down. How long will you own the building? BUR and modified bitumen have the longest track records, and TPO is lighter and more energy-efficient. How much foot traffic does the roof get from HVAC and other trades? Multi-ply systems tolerate it better than thin single-ply. Can the structure carry more weight? BUR is the heaviest option. And how much do cooling costs matter? A white TPO surface reflects heat a dark roof absorbs.
Installed pricing is quoted per square foot: modified bitumen typically runs $5-9/sf, TPO $6-11/sf, and BUR $7-12/sf. Insulation, deck condition and access decide where a job falls.
Flat Roof Drainage in Central Florida
Flat roofs aren't truly flat. They need slope to drains, scuppers and gutters, and most flat-roof problems start where that drainage fails. Afternoon downpours dump a lot of water fast, and a partly blocked drain leaves ponding that softens membrane and speeds up seam failure. Tapered insulation, clean drains and working overflows prevent it, and drain clearing is part of every commercial roof maintenance visit.
Leaking now? See commercial roof repair. Need a condition report before buying or refinancing? Our commercial roof inspection covers every flat-roof system.
Frequently Asked Questions
Modified bitumen (torch-down or self-adhered), built-up roofing (BUR / hot-tar), TPO single-ply, and EPDM rubber. We help you select the right system for your building.
Properly installed and maintained: modified bitumen 20-25 years, BUR 25-30 years, TPO 20-25 years. Maintenance is the biggest factor in actual lifespan.
Most flat roof leaks come from failed seams, blocked drains causing standing water, deteriorated flashing at walls and curbs, or punctures from foot traffic. Almost all are preventable with quarterly maintenance.
Sometimes — code allows up to two roofing layers in most Florida jurisdictions. We assess existing condition and structural capacity before recommending over-install vs. tear-off.
Quoted per square foot. Modified bitumen typically runs $5-9/sf installed. TPO $6-11/sf. BUR $7-12/sf. Real pricing depends on insulation, deck condition, and access.
Yes — quarterly or biannual maintenance is the single biggest factor in flat roof lifespan. Drain clearing, seam inspection, sealant refresh, written report on each visit.
The main commercial flat roof types are built-up roofing (BUR, multiple plies of asphalt and felt), modified bitumen (torch-down or self-adhered sheets), and single-ply membranes: TPO, which is heat-welded, and EPDM rubber. Some low-slope buildings use structural standing-seam metal instead. Each differs in lifespan, weight, cost and how it handles foot traffic.
When repairs stop holding. Signs include leaks in several areas, widespread seam failure or blistering, wet insulation under the membrane, recurring ponding, and a system past its expected life: about 20-25 years for TPO and modified bitumen, 25-30 for BUR. An inspection report with a remaining-useful-life estimate tells you how much time is left.
"Joe and his team did a great job on our roof and chimney project. He provided excellent and timely communication at all stages. He also worked on my neighbor's roof, who were very satisfied as well. Highly recommended!"
"Sun State Solar and Roofing did an absolutely amazing job on my roof. Joe made sure to communicate from start to finish. They knew I had small children and dogs, so they did an extra sweep to be sure no nails got left behind. If you need a new roof, these are your people. Professional and proficient."
"Highly recommend Sun State Solar & Roofing. Professional and excellent service from initial quote to finished roof. The crew took care to protect landscaping and outside areas while removing the existing roof. They did a great job of cleaning up around the house. My neighbors gave me so many compliments — they said it looks like a new house!"